Add missing minus in SimilarityTransform docstring

[akonsk]

added a missing minus in the homogeneous transformation matrix

Description

Checklist

• Docstrings for all functions
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[akonsk]

in my understanding, the equations are correct and the matrix is not.
the homogenous matrix should be:
[[s*cos_theta, -s*sin_theta, t_x],
[s*sin_theta, s*cos_theta, t_y],
[0,0,1]]
here:
a0 = s*cos_theta
b0 = s*sin_theta
a1 = t_x
b1 = t_y

in the correction you proposed there is a contradiction, as b0=s*sin_theta=-s*sin_theta

[rum1887]

Nice catch @akonsk !

[rum1887]

hi @akonsk , are you an Outreachy applicant?

[mkcor]

Thanks for the edit, @akonsk! All good now, I recognize the notation found, for example, at: https://en.wikipedia.org/wiki/Transformation_matrix#Affine_transformations

[mkcor]

@akonsk would you mind including the same docstring fix for class EuclideanTransform (line 1257)? Thanks!

[mkcor]

Suggested change

	[b0 a0 b1]
	[0 0 1]]
	[b0 a0 b1]
	[0 0 1]]

(to preserve alignment)

[lagru]

Thanks @akonsk!